表面电荷如何影响滴间结?
Siyan Yang1,2, Bingqiang Ji3, Yawei Feng2
1Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China.
概括
在电学上异质的表面会引发一种新的间滴冷继电器 (IFR) 现象. 冰针从冷的水滴中射出,加速冷并使3D传播成为可能,这对于抗结冰技术至关重要.
科学领域:
- 表面科学是一门学科.
- 材料科学 材料科学 材料科学
- 静电学 静电学 静电学
背景情况:
- 滴滴结在表面对于航空和运输等行业至关重要.
- 现有的研究重点是电均的表面,其中蒸汽压力梯度驱动结传播.
- 表面静电电荷对液滴冷动态的影响在很大程度上仍未被探索.
研究的目的:
- 为了研究静电电荷在液滴冷动态中的表面作用.
- 识别和描述电气异质表面上的新型结现象.
- 探索静电学在开发先进的抗结冰和抗材料方面的潜力.
主要方法:
- 在电异质表面上滴滴结的理论建模.
- 使用各种介电基质,液体和液滴配置的实验调查.
- 使用显微镜和热成像分析结传播途径和速率.
主要成果:
- 在电气异质表面上发现了间滴冷继电器 (IFR) 现象.
- 观测一个三维的,空气中的结传播途径.
- 由于表面电荷梯度和冰针形成,加速结速度的演示.
- 在不同的材料和条件下确认现象的普遍性.
结论:
- 在电异质表面上的表面电荷梯度显著影响滴滴结动态.
- 由静电学驱动的IFR现象提供了一个快速形成的新机制.
- 静电相互作用对于设计下一代被动防冰和防材料至关重要.
相关概念视频
Intermolecular Forces
61.4K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
61.4K
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
46.0K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
46.0K
Colloidal precipitates
781
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
781
Van der Waals Interactions
66.8K
Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.
66.8K
Intermolecular Forces and Physical Properties
22.8K
22.8K
Surface Tension, Capillary Action, and Viscosity
29.6K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
29.6K


